<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <script>
    var student = {
      name:"张三",
      age:10,
      score:{
        english:85,
        math:92,
        chinese:88
      }
    }
    function clone(obj){
      var newObj = {};
      for(var i in obj){
        newObj[i] = obj[i];
      }
      return newObj;
    }
    var newStudent = clone(student);
    console.log(newStudent.score == student.score);
  </script>
</body>
</html>